1968 Jones-Dix Yerupajá West Face Historic Direct Ascent
On July 27, 1968, British climber Chris Jones and American alpinist Paul Dix, supported by Dean Caldwell and Leif Patterson, completed the historic first ascent of the terrifying 1,200-metre West Face of Yerupajá (6,635 m). Braving relentless spindrift avalanches, vertical ice flutings, and hanging bivouacs, they unlocked the premier big-wall ice face of the Andes.

Mountain Safety & Conditions Disclaimer: High-altitude climbing, glacial travel, and technical ascents entail severe objective risks including avalanches, serac collapses, rapid weather collapse, and altitude illness. Historical route descriptions and summit claims on Mountanity reflect documented archival sources and must not be used as live operational safety assessments. Local regulations, permits, and physical glacial topography change continuously.
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Official Expedition Narrative & Archival Record
Eighteen years after the 1950 first ascent of Yerupajá via the South Ridge, an international quartet of elite alpinists—British climber Chris Jones and Americans Paul Dix, Dean Caldwell, and Leif Patterson—gathered at Laguna Jahuacocha to tackle the most intimidating objective in the Cordillera Huayhuash: the unclimbed 1,200-metre West Face of Yerupajá. Rising like a frozen tidal wave of 60-to-75-degree fluted ice and rotten quartzite bands, the wall was continuously swept by lethal spindrift avalanches. Climbing capsule-style with heavy rucksacks and technical ice axes, Jones and Dix led exhausting pitches up the central face, anchoring precarious hammocks and snow shelves for bivouacs. In late July, after enduring severe storms and near-constant stonefall, Jones and Dix broke through the overhanging corniced rim at 6,635 metres to reach the summit, joined closely by Caldwell and Patterson. Their climb stood as one of the boldest big-wall high-altitude undertakings of the 1960s, heralding modern extreme mixed climbing in the Andes.
Documented Team Composition
- Chris Jones (Lead Climber, United Kingdom)
- Paul Dix (Lead Climber, United States)
- Dean Caldwell (Climber, United States)
- Leif Patterson (Climber, United States)
Key Statistics & Topographic Figures
- Wall Height
- 1,200 m (3,937 vertical ft)
- Summit Date
- July 27, 1968
- Climbing Team
- Chris Jones, Paul Dix, Dean Caldwell, Leif Patterson
- Technical Difficulty
- ED, 60°-75° continuous firn and water ice
- Bivouac Method
- Hammocks suspended from pitons on vertical rock bands
Archival Primary Source Quotations
“The West Face of Yerupajá was our frozen cathedral; six days of cold, steel, and spindrift brought us to the roof of the Huayhuash.”
Defined Alpine Terminology & Concepts
- Spindrift Avalanche
- A powdery cascading stream of loose surface crystals blown off upper slopes that pours continuously down couloirs and faces.
- Capsule Style
- A big-wall alpine tactic where climbers move high camps upward in self-contained units, pulling ropes behind them as they advance.
Frequently Asked Questions: 1968 Jones-Dix Yerupajá West Face Historic Direct Ascent
Who made the first ascent of the West Face of Yerupajá in 1968?
British climber Chris Jones and American alpinist Paul Dix, accompanied by Dean Caldwell and Leif Patterson, completed the first ascent of Yerupajá's West Face on July 27, 1968.
How high is the West Face of Yerupajá?
The direct West Face of Yerupajá rises 1,200 metres (nearly 4,000 vertical feet) from the glacier basin above Laguna Jahuacocha to the summit at 6,635 metres.
What climbing style was used on the 1968 West Face ascent?
The team used a continuous capsule wall style, hauling gear in sacks, hanging nylon hammock bivouacs on pitons, and fixing lines through vertical ice funnels.
What major hazards did the 1968 team face on Yerupajá?
They faced continuous spindrift avalanches that poured down ice couloirs, stonefall from loose rock bands, and extreme sub-zero winds.
Ascent Route & Topography

Yerupajá West Face and South Ridge
The historic first ascent route of Yerupajá ascends the glaciated western cirque and tackles the ferocious, cornice-hung South Ridge to reach Peru's second-highest summit at 6,635 metres. Pioneered on July 31, 1950, by Harvard mountaineers Jim Maxwell and Dave Harrah, the route demands mastery of steep 60-degree firn, rotten limestone crags, and nerve-testing overhanging double snow cornices suspended over two-mile drops.
Target Objective Peak
Yerupajá
Yerupajá is the second-highest peak in Peru and the undisputed monarch of the Cordillera Huayhuash, soaring to 6,635 metres. Celebrated for its razor-sharp summit cornices, vertical ice walls, and ominous local moniker El Carnicero (The Butcher), it was first climbed in July 1950 by Jim Maxwell and Dave Harrah of the Harvard Andean Mountaineering Club. In 1968, Chris Jones and Paul Dix completed the first ascent of its fearsome 1,200-metre West Face.
Featured Expedition Climbers

Dave Harrah
Born in 1926, David Harrah graduated from Harvard University, where he distinguished himself as both an exceptional intellect and an accomplished rock climber with the Harvard Mountaineering Club. In the summer of 1950, Harrah served as a core climbing member of the Harvard Andean Expedition targeting Mount Yerupajá (6,635 m), the second highest mountain in Peru and the undisputed monarch of the Cordillera Huayhuash. Known locally as El Carnicero, the mountain had repulsed prior European scouting parties. Harrah demonstrated remarkable icecraft, pioneering the technical passages through the lower icefall and kicking thousands of steps up the steep firn slopes of the southwest wall. Paired with Jim Maxwell for the final push, Harrah led portions of the knife-edge South Ridge, gingerly straddling overhanging snow mushrooms suspended above dizzying abysses on either side. Reaching the summit late in the day on July 31, 1950, the pair celebrated a historic milestone for American mountaineering. During the perilous descent in fading light, a snow bridge collapsed, and the climbers were forced into an emergency open bivouac at 6,500 metres in brutal freezing winds. The night of extreme exposure caused catastrophic frostbite to Harrah's feet, ultimately requiring the surgical amputation of all his toes. Despite this life-altering injury, Harrah maintained a deep love for mountaineering literature and pursued an illustrious academic career, serving for decades as Professor of Philosophy at the University of California, Riverside, where he was a leading scholar of formal logic, semantics, and game theory.

Jim Maxwell
James Maxwell grew up in the northeastern United States and joined the Harvard Mountaineering Club following World War II, during an era when American climbers were beginning to match European standards on the world's great ranges. Known for his formidable physical stamina, ice-climbing skill, and rock craft honed in the White Mountains and Shawangunks, Maxwell helped organize the ambitious 1950 Harvard Andean Expedition to Peru. The objective was Mount Yerupajá (6,635 m), the towering second-highest peak in Peru, locally feared as El Carnicero (The Butcher) due to its lethal avalanches and knife-edge summit crest. Establishing a series of camps up the glaciated southwest slopes from Laguna Jahuacocha, Maxwell and his collegiate climbing partner Dave Harrah were selected for the final summit assault. On July 31, 1950, Maxwell and Harrah pushed through intense cold, step-kicking up 60-degree firn and delicately traversing monstrous overhanging double cornices suspended over 4,000-foot precipices. At late afternoon, they stood victorious atop Yerupajá's 6,635-metre pinnacle, claiming the first ascent of the greatest unclimbed peak in the Americas. Caught by darkness during the descent, the pair were forced to endure an unplanned open bivouac at 6,500 metres in temperatures plunging far below zero. Despite severe frostbite that later required the amputation of several toes, Maxwell displayed magnificent fortitude in shepherding his frostbitten partner down the mountain to safety. Maxwell's ascent marked the coming-of-age of American high-altitude mountaineering in the Andes and earned him enduring respect in alpine history.
Associated Historical Chronicles & Stories
Direct on El Carnicero: The 1968 West Face of Yerupajá
On July 27, 1968, Chris Jones and Paul Dix unlocked the 1,200-metre direct West Face of Yerupajá (6,635 m), achieving one of the greatest big-wall ice ascents of the era.
Documented Sources & Archival Citations
- Climbing in North America / American Alpine Journal(Chris Jones / American Alpine Club)
Supporting claim: Firsthand technical narrative and topo of the 1968 direct West Face climb of Yerupajá
Accessed/Documented: 1969 - Mountain Magazine: Yerupajá West Face(Ken Wilson)
Supporting claim: Contemporary photographic feature and analysis of the big-wall breakthrough
Accessed/Documented: 1969

